[Samba] Winbindd problems ... nevers answered ?

[Phibee Network operation Center]

Hi

i have 3 PDC on my network, and after reboot the first PDC, my winbindd 
can't call with it :

[root at gw squid]# wbinfo -t
checking the trust secret via RPC calls failed
error code was NT_STATUS_INVALID_COMPUTER_NAME (0xc0000122)
Could not check secret



[2005/06/07 10:20:30, 3] 
nsswitch/winbindd_misc.c:winbindd_interface_version(261)
  [22308]: request interface version
[2005/06/07 10:20:30, 3] 
nsswitch/winbindd_misc.c:winbindd_priv_pipe_dir(297)
  [22308]: request location of privileged pipe
[2005/06/07 10:20:30, 3] 
nsswitch/winbindd_misc.c:winbindd_check_machine_acct(41)
  [22308]: check machine account
[2005/06/07 10:20:30, 3] nsswitch/winbindd_cm.c:cm_get_ipc_userpass(109)
  cm_get_ipc_userpass: No auth-user defined
[2005/06/07 10:20:31, 0] rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
  cli_nt_setup_creds: request challenge failed
[2005/06/07 10:20:31, 3] nsswitch/winbindd_cm.c:cm_prepare_connection(387)
  schannel refused - continuing without schannel 
(NT_STATUS_INVALID_COMPUTER_NAME)
[2005/06/07 10:20:31, 0] rpc_client/cli_netlogon.c:cli_nt_setup_creds(256)
  cli_nt_setup_creds: request challenge failed
[2005/06/07 10:20:31, 3] 
nsswitch/winbindd_misc.c:winbindd_check_machine_acct(68)
  could not open handle to NETLOGON pipe
[2005/06/07 10:20:31, 2] 
nsswitch/winbindd_misc.c:winbindd_check_machine_acct(98)
  Checking the trust account password returned 
NT_STATUS_INVALID_COMPUTER_NAME




i restart winbindd and now i have

[root at gw samba]# wbinfo -t
checking the trust secret via RPC calls succeeded
[root at gw samba]#


only whith a  stop/start


1- Why Winbindd don't "reconnect" to the PDC when he lose the connection ?
2- Why he don't sent the request to the second PDC when the first are died ?
3- Can i put a script for auto detection if the connexion are good ?
4- Into my smb.conf, i have :
             security = domain
             password server = *
   i can specify a list of IP/PDC for he sent the request ?


Please help me to understand this problems.